OUR knowledge of the structure of very fine spectrum lines is now on a secure and nearly comprehensive basis, from the points of view of both theory and of experiment, and it is very remarkable that ...

A new quantum sensor can analyze the full spectrum of radio frequency and real-world signals, unleashing new potentials for soldier communications, spectrum awareness and electronic warfare. Army ...

This image shows (a) the Nature magazine cover; (b) the single atom X-ray mechanism; (c) a supramolecular ring with one iron atom; (d) X-ray spectra of one iron atom; (e) a terbium dimer complex; (f) ...